Oh boy they’re growing up fast!

With no sign of mom or dad at home the adorable Gosselin kids took to the snow on Sunday to let off a little steam and partake in a gigantic snowball fight!

PHOTOS: The Gosselin Kids Play In The Snow

Bundled up warmly against the freezing temperatures, the kids let loose on the front yard of their Reading, PA home, scooping up giant snowballs to throw at each other.

PHOTOS: Kate Runs Chores And Shops

Looks like it was a fun filled Valentines day for the kids, who were being looked after by their nanny. Wonder if mom and dad enjoyed their first unmarried Valentines as much?